Cramer: This healthcare stock is now too big to be acquired

It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on caller favorite stocks at rapid speed:

Abiomed Inc: "I have always felt that those guys would get the takeover bid, but it went to St. Jude. It's probably a little too expensive, but they've got a great mouse trap. As does Edwards Life Sciences, which is too big to be acquired."

Harman International Industries: "This company got hurt by the strong dollar and I think it is actually very cheap at $5.5 billion. But I've got to tell you, I understand that the quarters have been rocky. Dinesh [CEO] has to deliver."

Juno Therapeutics: "We don't do the clinical stages anymore. Remember they have gotten way too difficult. We prefer if you do an anti-cancer franchise, it's JNJ or Bristol-Myers."